DD is 14.5 months and I have been able to keep her on 2 naps by capping the 1st one quite short but in the last 2 weeks we've had increasing numbers of days where she has taken a long time to go to sleep for naps (1hr20min one day) or skipping one of the naps altogether. She's got a bit OT I think from the days of skipped naps so has been doing longer nights than usual. A usual day was bed at 7pm, sometimes straight to sleep but sometimes play for a bit before falling asleep, and awake around 6:30am but could be as early as just after 6am or occasionally all the way to 7am.
After Wednesday with my mother in law when she slept in the morning but not in the afternoon (but fell asleep in the car on the way home so still less than 1.5hr split into 2 short naps) she was really tired and cranky in the evening so I decided it's probably better to just move to one nap. After that day she slept in until 7:30am yesterday morning (12.5hr sleep overnight) and I put her down for a nap at 12:15pm and she only(!) slept for 1.5hr. I was a bit disappointed as other days when I have just given her one big nap it has usually been 2hrs+. But then I thought that is still 14hr sleep in 24hr so not unreasonable at all for her.
This morning she slept past 7am again and it got me to thinking, if she got into a habit of long (12hr+) nights would I start waking her a bit earlier in the morning to try to get a longer nap...? just a hypothetical at the moment as it's only day 2 of only having 1 nap. Wondering if anyone else has had this "issue" though! My 3yo nephew usually naps for 3hrs/day but I know he goes to bed later than DD. I know we have it so good really so don't know why I'm even thinking about it really... she is textbook/angel and has always responded much better to a really really consistent routine (and set naps/bedtime) than going with the flow.